William Morder composed on 2018-03-24 08:18 (UTC-0700):

> A friend told me that he creates separate partitions for both /opt and /etc; 
> and then, too, I noticed that the new Icecat browser does something even 
> weirder, which is to install in /usr/lib/icecat, rather than (like other 
> Mozilla browsers) in /home/<USER>/.mozilla/. 

Mozilla browser *profiles* (user data) traditionally go in ~/.mozilla
(/home/username/.mozilla). On my systems this is Firefox and SeaMonkey.
Thunderbird's go in ~/.thunderbird.

Mozilla predates other common GUI web browsers by a bunch of years, when users'
appdata went in $HOME by convention. Newer browsers, eg $HOME/.config/chromium,
have adopted a superceding convention, $HOME/.config/appname/.

/usr/lib/appname is where most apps go, main exception being those that
inexplicably decide on /opt/ instead.
-- 
"Wisdom is supreme; therefore get wisdom. Whatever else you
get, get wisdom." Proverbs 4:7 (New Living Translation)

 Team OS/2 ** Reg. Linux User #211409 ** a11y rocks!

Felix Miata  ***  http://fm.no-ip.com/